Between a four-year gap in the murder of a young girl, the daughter of a well-known sculptor is discovered dead, and her parents conduct an investigation, only to discover they are in over their heads as the body-count keeps rising.
| Actor | Role |
|---|---|
 George LazenbyFranco Serpieri | Franco Serpieri |
 Anita StrindbergElizabeth Serpieri | Elizabeth Serpieri |
 Adolfo CeliSerafian | Serafian |
 Dominique BoscheroGinevra Storelli | Ginevra Storelli |
 Peter ChatelPhilip Vernon | Philip Vernon |
 Piero VidaJournalist Cuman | Journalist Cuman |
 José QuaglioBonaiuti | Bonaiuti |
 Alessandro HaberFather James | Father James |
 Nicoletta ElmiRoberta Serpieri | Roberta Serpieri |
 Rosemarie LindtGabriella | Gabriella |
| GGiovanni RosselliFrançois Roussel aka Francesco Storelli | François Roussel aka Francesco Storelli |
| SSandro GrinfanPolice Commissioner De Donato | Police Commissioner De Donato |
| CCarlo HolleschThe Man Who Plays Table Tennis | The Man Who Plays Table Tennis |
 George WillingAndrea | Andrea |
 Vittorio FanfoniNews Cameraman | News Cameraman |
 Luigi Antonio GuerraNews Reporter | News Reporter |